Dark data is the information your company collects but never uses—like old...

https://papa-wiki.win/index.php/NAS_vs_Object_Storage_for_Archives_%E2%80%93_What_Is_Cheaper_Long_Term%3F

Dark data is the information your company collects but never uses—like old files hiding on servers. Around 55% of stored data is dark, which means you’re paying to keep it safe but getting no value